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PATRICK W. LAMB, O'F ALBANY, NEW YRK. Letters .Patent No, 60,909, dated January 1, 1867.

IMPROVEMENT IN SPBUE FOR .llllOlTLDl-RS.l

vT() ALL WHOM IT MAY CONCERN:

Be it known that I, PATRICK W. LAMB, of the city and county of Albany, in the State of New York, have invented a new and useful improvement in the manufacture of Sad-Iron Handles, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, which forms part of this specification, and in which- Figure 1 represents alvertical section through aber mould, with the sprue and handle patterns in the course of being moulded. i

. Figure 2, also a vertical section of the same, taken at right angles to the former gure.

Figure 3, a similar view to the last, but with the patterns removed; and l Figure 4, a view in perspective of the casting as formed by said patterns, the cope or upper box part being removed.

In the manufacture of smoothing or sad-iron handles, that is, in providing the usual wrought-iron shankor handle-rod with a cast-iron swell forming the handle proper, it is customary to cast the latter on or around the former. By thus shrinking the cast-iron handle on the rod and amalgamating, as it'were, the two, and uniting in the -usual, or any suitable way, the rod at its ends, which protrude through the handle proper, with the smoothing portion of the iron, a solidity is given in a cheap and eectual manner to the implement, the castiron handle being made to form, as it might be'said, part and parcel of the rod, and consequently secure against getting loose or turning. It has heretofore, however, been'the practice in thus uniting the handle and rod, or handles and rods of a series, within a box mould, to runin the molten metal by gates communicating at both .ends with one side of the space constituting ythe form or matrix oi'v a handle. This has not always formed the perfect union that is desirable between the handle and its rod, as the hot metal coming in contact with the cold iron at the ends ofthe form, and meeting with more or less moisture, besides (having but little`superincumbent pressure, is apt to blow AfterA the casting has been made, too, there are left, on breaking the sprue od', considerable burs, at either end of the handle, to be afterwards reduced or ground off', thus making the dressing of such a construction` expensive. My invention obviates these defects, and the nature of it consists in casting the handle on or around the rod by runningrin the molten metal under a superin'cumbent pressure consequent on a direct vertical head over the rod-at the part which forms the centre of the handle, by means of a peculiar construction and arrangement of the sprue, which also is made to accommodate a series of forms, andhwhen detached leaves scarcely-a bur, and that at one point only in the handle.

To enable others skilled in such matters to apply my invention, `I will now proceed to describe it with reference to the accompanying drawing, in which- A isthe cope or upper box part of a mould, and Bthe lower one, or nowel; C is a sprue pattern, of tooth or comb shape", tapering vertically, and with its teeth or branches avt-preferably rounded towards their points and' made to dip down into the mould so als to pass into the handle patterns b, over the rods c, arranged side by side at intervals apart in the mould, each tooth a, of the sprue pattern, being pitched or arranged to lie over the 4centre of a handle. On withdrawing the patterns from the box mould a tapered sprue cavity, d, is left over and communicating with each handle form. e, at its centre, directly over the rod, so that on pouring the molten metal into the channel formed 'by the top or back of the sprue pattern, the several branches or tapered yer-tical inlets made by the teeth a, receive and conduct the uid metal and cause it directly to impinge on the rods c, which heats,the rods, avoids all tendency toblow by contact with dampness, and a solidity is produced in or to the handle castings by the direct superincumbent pressure of the molten metal, which is tantamount to the amalgamation of the wrought vand cast-iron portionsof the handles, while on removing the upper box part, as shown in fig. 4, the sprue Will only be attached to the handles at a point in their centre, so lthat on breaking oif the sprue, o1' detaching the handles from it, scarcely a bur will'be left on the handles, and this onlyv at one point, thereby reducing, after dressing lof them by grinding or otherwise.

What I claim as new and useful, and desire to secure byLetters Patent, is-

The toothed sprue pattern C, constructed substantially as described, and applied so that the spaces moulded 'by it communicate with the handle forms e, at their centre, over the handle-Shanks or rods c, essentially as and for the purpose or purposes herein set forth.

P. W. LAMB. 'Witnessest FRANCIS H. Woons, JOHN McELNY.' 

